Tyre pressures Flash S2

I would like to hear from Chausson Flash S2 owners regarding the tyre pressures they are using when fully laden ready to tour and when they are not touring and run about half the payload. I am not alone with wanting to ensure we keep our tyre pressures legal at all times but find that the plated pressures make the vehicle noisy and the steering becomes vague, between us we can try our best to establish more realistic tyre pressures. Hopefully I receive enough positive replies so I can discuss our findings with Continental, Fiat and Chausson.